Allow iteration of TodoList items.

test/test_todo_list.py

@@ -234,6 +234,19 @@ class TodoListTester(TopydoTest):
 
         self.assertNotEqual(self.todolist.number(todo), 't5c')
 
+    def test_iteration(self):
+        """ Confirms that the iternation method is working. """
+        results = ["(C) Foo @Context2 Not@Context +Project1 Not+Project",
+                   "(D) Bar @Context1 +Project2",
+                   "(C) Baz @Context1 +Project1 key:value",
+                   "(C) Drink beer @ home",
+                   "(C) 13 + 29 = 42"]
+
+        i = 0
+        for todo in self.todolist:
+            self.assertEqual(todo.src, results[i])
+            i += 1
+
 
 class TodoListDependencyTester(TopydoTest):
     def setUp(self):
@@ -402,6 +415,7 @@ class TodoListDependencyTester(TopydoTest):
         self.assertTrue(self.todolist.dirty)
         self.assertTrue(self.todolist.todo_by_dep_id('99'))
 
+
 class TodoListCleanDependencyTester(TopydoTest):
     """
     Tests for cleaning up the graph:

topydo/lib/PrettyPrinterFilter.py

@@ -29,4 +29,3 @@ class PrettyPrinterFilter(object):
         Applies a filter to p_todo_str and returns a modified version of it.
         """
         raise NotImplementedError
-

topydo/lib/TodoListBase.py

@@ -54,6 +54,12 @@ class TodoListBase(object):
         self.add_list(p_todostrings)
         self.dirty = False
 
+    def __iter__(self):
+        """
+        Allows use of `for my_todo in todolist` constructs.
+        """
+        return iter(self._todos)
+
     def todo(self, p_identifier):
         """
         The _todos list has the same order as in the backend store (usually